is it a mature hairline or a receding hairline? my dad had a receding hairline at 38,uncles aren't bald at all (photos)

Im 20yo male,I've been experiencing an itchy scalp especially from the front and the back with a mild hairloss for over a year:5-15 hairs in the shower daily and i notice few hairs falling.my life is stressful,I've had a shock once when my dad got a severe stroke.I visited many doctors and all of them told me my hair is very fine and everyone around told me my hairline didn't change at all,but I feel that my hairline changed very slightly in the past 2 years. could it be a mature hairline?